Filtration Skyscrapers in the oceans could "solve environmental and energy problems" around the world

Architectural designer and visualiser Honglin Li has proposed deploying floating high-rise waste-to-energy plants fuelled by plastic waste to clean up the oceans while generating electricity.
The sci-fi proposal, called Filtration Skyscraper, imagines placing unmanned towers on abandoned oil rigs in parts of the oceans where plastic waste accumulates.
Sophisticated machinery in the conceptual towers would generate electricity and biofuels from plastic and other pollutants extracted from seawater